Simulation study on cavity size for Si3N4 ceramics in process of MDSAM

摘要

In order to study the effect of machining parameters on machining efficiency, the size of ablation cavity for Si3N4 ceramics during process of micro-detonation of striking arc machining (MDSAM) is simulated.By means of simulation method and machining test, the cavity size can be achieved.Influences of machining parameters on cavity depth and diameter are computed and analyzed by single factor experiment. The results show that the experimental results are consistent with the simulation results as taking into account the loose deteriorative layer.Big working current, pulse width and small working distance can cause big machining efficiency. The nozzle radius should range from 1 mm to 1.4 mm. The research can present a method for precisely controlling the process of MDSAM. The simulation method can precisely calculate the cavity size and the process of MDSAM can be controlled more accurately.